Twitter is an incredibly useful publishing medium. It lets you instantly shout across the world any poorly-considered thought that can bridge the gap between your brain and your computer keyboard. Are you angry? Drunk? Twitter is definitely the medium for you if your judgment is even slightly impaired.

We all say terrible things sometimes. But if you're a celebrity on Twitter, you can be sure that a lot of people will know about those terrible things.

You can't edit a tweet. You can only delete it. So if you've been caught with an offensive tweet, it may be a good idea to apologize in a subsequent tweet.

Yesterday, comedian and actor Patton Oswalt showed his skill with the medium by tweeting out apologies for deleted, horrifically offensive tweets. Except those deleted tweets never existed.

Yikes. Had to delete another Tweet. I crossed a line on that one. Also, I thought 12 YEARS A SLAVE and THE BUTLER were brilliant.